THE next few days are going to be unbearable for large swathes of the country as an extreme heatwave sees temperatures soar. Parts of Queensland, New South Wales, South Australia and Victoria are expected to cop it the worst for the next four to five days, with temperatures predicted in the high 30s to possibly mid-40 degree mark.The dire forecast saw the website of the popular weather tracker Higgins Storm Chasing crash overnight, as tens of thousands of social media users tried to get as much information as they could.The southeast is expected to be cloudy with a chance of showers on Thursday but temperatures are still expected to be very warm.